School slate



H. G. cREss SCHOOL SLATE Oct. 21 19.24. 1,512,677

Filed Sep'cl. 28 1922 ma @a am f' Uw fly. j

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Img/gufo@ @Y 13AM 94M@ ATTYS` Patented ct. 2l, 1924.

UNITED STATES I HORATIO Gr. CRESS, OF TROY, OHIO.

soHooL s-LATE.

Application led September 28, 1922.

To all whom t may concern.'

Be it known that I, HoRA'rio G. Crass, a citizen of the United States, residing at Troy, in the county of Miami and State of Ohio, have invented a certain new and useful Improvement in School Slates, of which the following is a full, clear. and exact description, reference being had to the accompanying drawings.

This invention relates to educational devices, particularly to sli-ttes` and has for one of its objects the provision of an unbreakable slate which is attractive in appearance, and which possesses the characteristics of simplicity in construction and durability in use.

I accomplish the above objects by employing a pair of sheet metal plates having raised portions disposed opposite each other with a filler intermediate the raised portions to provide rigidity for writing purposes and prevent noise from vibration. rlhe plates are extended beyond the raised portion and shaped around the marginal edges thereof to form a hollow bead, which serves to materially strengthen the slate and to preserve the writing surface. Moreover, I subject the metal to a treatment characterized as slatizing for enabling the surface to be Written upon with chalk or pencil.

The means for carrying out my invention will be fully set forth in the following` description which pertains to the accompanying drawings; the essential features will be summarized in the claims.

In the drawings, Fig. 1 is a plan of a slate embodying features of my invention; Fig. 2 is a section on the lines 2-2 of Fig. l; and Fig. 3 is a section on an enlarged scale taken through the slate adjacent the rim portion thereof. y

I have shown my invention as comprising a pair of opposed plates 10 and 11, each of which has a raised portion, as at 12 and 13, disposed opposite each other. A filler 14 is placed intermediate the raised portions to provide a rigid backing for the surfaces which are adapted for writing purposes. This also prevents any noise which may result from vibration of the writing surface. The fiat or depressed portions outside the writing surface are preferably provided with characters, indicated generally at 15,

to form a standard for copying. The plates Serial No. 591,065.

are slatiaed7 preferably before being formed to the required shape.

The plates 10 and 11 are shown as circular and as having the marginal edges thereof folded outwardly as at 1G and 17, and then backwardly as at 1S and 19, to overlap each other and thus to provide a hollow bead or rim. Moreover planes passing through the top and bottom of the bead lie outside those passing through the raised portions 12 and 13, thus providing a strong and durable rim which prevents the breaking of the slate due to improper use thereof.

From the foregoing description, it will be seen that a slate constructed according to my invention may be readily made of light sheet metal stampings and be capable of use for an indefinite period. Furthermore the construction employed produces a slate which is light in weight and attractive in appearance.

I claim 1. In a device of the character described, a pair of sheet metal plates having raised portions disposed opposite each other, and each having a flat portion extending around the marginal edge of the raised portion, a filler intermediate the raised portions, said raised portion being treated for writing purposes.

2. In a device of the character described, in combination with a pair of plates having opposed raised portions, said portions being slatized to form writing surfaces, a filler disposed intermediate the raised portions, and a bead extending around the marginal edges of the plates and assisting in holding them together.

3. A double faced slate comprising a pair of sheet metal plates intermediately spaced apart, and joined around the marginal edges of the spaced portion to provide a fiat portion and a filler intermediate the spaced portion, the exterior of such spaced portions being treated to provide a writing surface.

4. In a deviceof the class described, a pair of sheet metal plates having raised portions disposed opposite each other, a filler intermediate the raised portions, the raised portions being slatized for writing purposes, and the marginal edges of said plates being shaped in such manner that one embraces the other to provide a hollow bead whereby planes defining the top and bottom of the bead enclose planes defining the raised portions of said plates.

A device of the class described coinprising a pair of plates having opposed raised portions to provide a Writing surface, a bead extending around the marginal edges of the plates, and flat portions between the raised portions and bead, there being characters on said flat portions providing a suitable standard for copying. 10

- In testimony whereof, l hereunto allix my signature.

HOB-ATI() G. CHESS. 

